Topic: While I've Got That Apart - PROJECT COMPLETE
in Forum: C3 Engines
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Moderator
Duncanville, TX - USA
Joined: 11/8/2003
Posts: 20214
Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/
Am-Fm/map light National/Regional/Chapter NCRS "Top Flight"
#2-1985 Bright Red/Carmine Cp.L-98/auto
Member: NCRS, NCRS Texas, Corvette Legends of Texas
When you get the new oil pump, remove the bottom plate, and flat sand it, to make SURE it is perfectly flat. Do the same with the bottom of the pump itself. You'd be surprised at how many are warped beyond recognition. Then put a small amount of a light grease(lubriplate works well) on the pump gears, inside the pump housing, and on the bottom plate before re-assembling it. This will ensure the pump will pick up oil instantly when you first fire it up, as well as provide some lubrication to an otherwise DRY oil pump, on start-up. 
If you want to verify the outer ring on the balancer, get the #1 piston up on Top Dead Center on the compression stroke, and check the marks. The groove/line on the balancer should be aligned EXACTLY on the "0", or "V" on the timing tab. If it's just a wee bit off, it could simply be the tab is bent, or something like that. If it is off more than a few degrees, the outer ring has moved. Of course, if the rubber is cracked all to hades, you should go ahead and replace it..."while you're there".

If you want to verify the outer ring on the balancer, get the #1 piston up on Top Dead Center on the compression stroke, and check the marks. The groove/line on the balancer should be aligned EXACTLY on the "0", or "V" on the timing tab. If it's just a wee bit off, it could simply be the tab is bent, or something like that. If it is off more than a few degrees, the outer ring has moved. Of course, if the rubber is cracked all to hades, you should go ahead and replace it..."while you're there".

Joel Adams
C3VR Lifetime Member #56
My Link
(click for Texas-sized view!) NCRS
"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"
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Joel - Will do on the new oil pump and the balancer, keep the tips coming !! Wow, Summit Racing just made the top of my preferred vendor's list. Online order placed late Wednesday night about midnight PST, the complete shipment from their Sparks NV warehouse arrived at my door this morning !!
|UPDATED|4/17/2015 11:58:33 AM (AZT)|/UPDATED|
|UPDATED|4/17/2015 11:58:33 AM (AZT)|/UPDATED|
John Sigmund

valkman57@sbcglobal.net
NCRS Member 61302
NW NCRS Chapter Member

Duct tape is the new Black !!
John, You are right about Summit Racing. I use them a lot for the various cars I work on. Living in southern Oregon I usually get my parts from them the next day. Their customer service is No.1, at least in the Sparks Dist. Center.
Cindy - been there, done that (twice), looks like your doing a great job !! I am desperately trying to keep the body on and engine in this one. Keep us posted on your progress. What your current ETA on completion ??
John Sigmund

valkman57@sbcglobal.net
NCRS Member 61302
NW NCRS Chapter Member

Duct tape is the new Black !!
So its been a couple weeks since I started my water pump to rear main seal project and I thought I'd post some pics and an update. Overall the project has gone smooth, really smooth. Things were pretty dirty and grimey, but no major problems during the tear down. Nothing busted, stripped or otherwise threw a monkey wrench into the works. I've been taking my time, cleaning, tagging and bagging everything for easy re-assembly. The only real issues I've had so far were some new parts that were close, but required some exchange.




|UPDATED|5/22/2015 12:12:32 AM (AZT)|/UPDATED|
Under the "very glad I did this" column are the timing chain and oil pan.

The timing chain was the original and surprisingly the plastic coated cam gear was in still one piece. It was showing a bit of age and had a few cracks in it so I'm glad it's outta there. The chain itself was the worst part - as a result of gear wear, chain stretch or both, it had a strong 1/2" of play on each side. Bye bye Mr. chain !!
The oil pan was the other part of the "glad I did this". The pick-up screen was pretty gritty and there was about 1/4" of gray "bubble gum" sludge in the bottom of the pan. New pick-up installed and pan nice and clean, I also was able to carefully tap out a few dents in the oil pan before a coat of paint.

So now it's time for the new chain and gears, Comp Cams 3100 true roller. Fit like a glove and I've got to say some pretty serious engineering went into getting that wider chain and gears under the stock TC cover. I got out the calipers and the calculator several times to make sure it was going to clear both the block and cover.

As part of the clean-up effort I removed the fuel pump. It certainly looks original, but I need to do some research into the PN number I found. Anyone got AC fuel pump part number ID codes ?? Removing the fuel pump also made replacement of the RH motor mount much easier. With some clean up and new motor mounts on both sides I could actually see where my new plug wires needed to be routed up to the forward plugs.

Here's a shot of the the top end with TC back on, plug wires routed and PS pump cleaned and ready to go. Just waiting for the return of my harmonic balancer. Found a guy down in Salem OR. that specializes in HB's. Cleaned, reset to original specs and bonded with a special silicone that replaces the original rubber sleeve. Guaranteed for the life of the car and he rebuilt my original balancer, not one from the core pile.

Another shot from the bottom end. PS control valve rebuilt and installed with new pressure and return lines to the pump. Except for some oil and a new filter, the bottom side is ready to go.
Here's where I ran into a few parts problems.
First of all the pick-up I ordered was too short and would not clear the internal oil pan baffle, no big deal. Also had to search out a new oil pump. The high volume pump I ordered from Summit came with a warning label that it was high pressure, not what I ordered. Called Summit, they called Sealed Power and assured me the the pump was high volume only and the warning label was inserted by mistake. Looking at the box, which looked as though it had been previously opened, I decided to play it safe and install a standard pressure/volume pump fresh from my local Napa.
The final parts disappointment was the new one piece oil pan gasket by Felpro. I had just used their new t-stat gasket with the built in o-ring and was looking forward to the one piece pan gasket. Out of the box it looked great but as I started to read the instructions and noticed the new set of pan bolts that came in the kit, I knew I had a problem. The new gasket is quite a bit thicker than the standard and they highly recommend the use of the longer bolts for proper thread engagement. Doing a little dry fit, it soon became clear that my original pan bolts wouldn't even come close. Being the original nuts and bolts guy that I am, back to Napa for the std. 4 piece kit. I think the new gasket is a great gasket design and I may use it on other vehicles, just not this one.
More to come when my HB arrives !!
|UPDATED|5/22/2015 12:12:32 AM (AZT)|/UPDATED|
John Sigmund

valkman57@sbcglobal.net
NCRS Member 61302
NW NCRS Chapter Member

Duct tape is the new Black !!

Moderator
Duncanville, TX - USA
Joined: 11/8/2003
Posts: 20214
Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/
Am-Fm/map light National/Regional/Chapter NCRS "Top Flight"
#2-1985 Bright Red/Carmine Cp.L-98/auto
Member: NCRS, NCRS Texas, Corvette Legends of Texas
The 40769 fuel pump is correct for the car. Same pump was/is used for several year/car models....very common pump.
Looking good!!
Looking good!!

Joel Adams
C3VR Lifetime Member #56
My Link
(click for Texas-sized view!) NCRS
"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"
Hey Joel, thanks for confirming the fuel pump P/N. I also did some digging and found date code information on the NCRS website - the 305L preceeding the P/N is the Julian date code for the pump. 305 = October 31st, L = 1972, both are perfect for my December 13th, 1972 car !!
John Sigmund

valkman57@sbcglobal.net
NCRS Member 61302
NW NCRS Chapter Member

Duct tape is the new Black !!
Wow looks great, sadly I'm a long way from where you are. Just finished seeding so hopefully get to sandblasting the frame in June.My hopes are to have suspension all back on car this fall, I do have some of it all redone and just waiting for frame so I can continue. On the other hand I have been working on my 92, just back from shop where i had the cracks fixed on fenders and a paint job. Looks like previous owner had fender flares on it and did a poor job of fixing the holes, hence the cracks, now I'm hoping to replace front and rear seal as it has developed oil leaks and that drives me crazy. Not going to do that I will take it to a shop some things are just worth paying for when you don't have a hoist to work on these cars.


in Forum: C3 Engines
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